A More Reactive Trigonal Bipyramidal High-Spin Oxoiron(IV) Complex with a cis-Labile Site

摘要

The trigonal bipyramidal high-spin (S = 2) oxoiron(IV) complex [Fe^IV(O)(TMG2dien)(CH3CN)]²⁺ (>7) was synthesized and spectroscopically characterized. Substitution of the CH3CN ligand by anions, demonstrated here for X = N3⁻ and Cl⁻, yielded further S = 2 oxoiron(IV) complexes of general formulation [Fe^IV(O)(TMG2dien)(X)]⁺ (>7-X). The reduced steric bulk of >7 relative to the published S = 2 complex [Fe^IV(O)(TMG3tren)]²⁺ (>2) was reflected by enhanced rates of intermolecular substrate oxidation.